gint64 gdk_frame_timings_get_predicted_presentation_time ( GdkFrameTimings* timings )
Gets the predicted time at which this frame will be displayed.
Although no predicted time may be available, if one is available,
it will be available while the frame is being generated, in contrast
gdk_frame_timings_get_presentation_time(), which is only
available after the frame has been presented.
In general, if you are simply animating, you should use
gdk_frame_clock_get_frame_time() rather than this function,
but this function is useful for applications that want exact control
over latency. For example, a movie player may want this information
for Audio/Video synchronization.